There are certain breeds of dogs (and individual dogs within the same breed) that just seem to handle similar pain and stress better than others. I don't see why this would be unique to dogs.I think you have completely misunderstood what I was trying to say.
As per the title of this thread, I'm simply agreeing with the suggestion that certain personality types have harder time dealing with tinnitus.
This is not to say it's the dog's fault (or person) if their suffering is greater. This is not because one dog is more positive of a thinker than another or has a better personality.
Some people really do seem to suffer more. Unfortunately, that is often used as a way to dismiss suffering. People can point to a rare "inspirational" person and say anyone can do that. To me, that makes as much sense as expecting a Chihuahua to have the pain tolerance of a pit bull.